How does ozone depletion occur?

Question

Brooklyn Alexander · Accepted Answer

By reaction of stratospheric ozone with certain compounds, faster than it can be replenished naturally.

Radiation in the upper atmosphere naturally creates ozone from atmospheric oxygen. See https://tutor.hix.ai and https://tutor.hix.ai for more information. The majority of the gases that are responsible for depleting stratospheric ozone are anthropogenic, but some, like CH3Br and CH3Cl, have natural contributions as well. Since the mid-1970s, GMD has been monitoring three gases that significantly contribute to stratospheric ozone depletion: CFC-11, CFC-12, and N2O. Since then, numerous additional CFCs, HCFCs, and other halogenated gases have been incorporated into the measurement program as the number of monitoring sites increased. The website for the Ozone Layer at NOAA.gov/science/ozoneDepletion.htm GSFCC.NASA.gov/ozonewatch Ozone can be found at https://tutor.hix.ai

Emilia Aguirre · Answer

undefined Ozone depletion occurs primarily due to human-made substances called ozone-depleting substances (ODS), such as chlorofluorocarbons (CFCs), halons, and certain other industrial chemicals. These substances release chlorine and bromine atoms when they reach the stratosphere, leading to the breakdown of ozone molecules. This process weakens the ozone layer, allowing more ultraviolet (UV) radiation from the sun to reach the Earth's surface.